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C/C++ Source or Header  |  1999-09-17  |  9.0 KB  |  364 lines
  1. /*
  2.  *  linux/openpic.h -- OpenPIC definitions
  3.  *
  4.  *  Copyright (C) 1997 Geert Uytterhoeven
  5.  *
  6.  *  This file is based on the following documentation:
  7.  *
  8.  *    The Open Programmable Interrupt Controller (PIC)
  9.  *    Register Interface Specification Revision 1.2
  10.  *
  11.  *    Issue Date: October 1995
  12.  *
  13.  *    Issued jointly by Advanced Micro Devices and Cyrix Corporation
  14.  *
  15.  *    AMD is a registered trademark of Advanced Micro Devices, Inc.
  16.  *    Copyright (C) 1995, Advanced Micro Devices, Inc. and Cyrix, Inc.
  17.  *    All Rights Reserved.
  18.  *
  19.  *  To receive a copy of this documentation, send an email to openpic@amd.com.
  20.  *
  21.  *  This file is subject to the terms and conditions of the GNU General Public
  22.  *  License.  See the file COPYING in the main directory of this archive
  23.  *  for more details.
  24.  */
  25.  
  26. #ifndef _LINUX_OPENPIC_H
  27. #define _LINUX_OPENPIC_H
  28.  
  29. #if !defined(__powerpc__) && !defined(__i386__)
  30. #error Unsupported OpenPIC platform
  31. #endif
  32.  
  33.  
  34. #ifdef __KERNEL__
  35.  
  36.     /*
  37.      *  OpenPIC supports up to 2048 interrupt sources and up to 32 processors
  38.      */
  39.  
  40. #define OPENPIC_MAX_SOURCES    2048
  41. #define OPENPIC_MAX_PROCESSORS    32
  42.  
  43. #define OPENPIC_NUM_TIMERS    4
  44. #define OPENPIC_NUM_IPI        4
  45. #define OPENPIC_NUM_PRI        16
  46. #define OPENPIC_NUM_VECTORS    256
  47.  
  48.  
  49.     /*
  50.      *  Vector numbers
  51.      */
  52.  
  53. #define OPENPIC_VEC_SOURCE      0x10    /* and up */
  54. #define OPENPIC_VEC_TIMER       0x40    /* and up */
  55. #define OPENPIC_VEC_IPI         0x50    /* and up */
  56. #define OPENPIC_VEC_SPURIOUS    99
  57.  
  58.  
  59.     /*
  60.      *  OpenPIC Registers are 32 bits and aligned on 128 bit boundaries
  61.      */
  62.  
  63. typedef struct _OpenPIC_Reg {
  64.     u_int Reg;                    /* Little endian! */
  65.     char Pad[0xc];
  66. } OpenPIC_Reg;
  67.  
  68.  
  69.     /*
  70.      *  Per Processor Registers
  71.      */
  72.  
  73. typedef struct _OpenPIC_Processor {
  74.     /*
  75.      *  Private Shadow Registers (for SLiC backwards compatibility)
  76.      */
  77.     u_int IPI0_Dispatch_Shadow;            /* Write Only */
  78.     char Pad1[0x4];
  79.     u_int IPI0_Vector_Priority_Shadow;        /* Read/Write */
  80.     char Pad2[0x34];
  81.     /*
  82.      *  Interprocessor Interrupt Command Ports
  83.      */
  84.     OpenPIC_Reg _IPI_Dispatch[OPENPIC_NUM_IPI];    /* Write Only */
  85.     /*
  86.      *  Current Task Priority Register
  87.      */
  88.     OpenPIC_Reg _Current_Task_Priority;        /* Read/Write */
  89. #ifndef __powerpc__
  90.     /*
  91.      *  Who Am I Register
  92.      */
  93.     OpenPIC_Reg _Who_Am_I;            /* Read Only */
  94. #else
  95.     char Pad3[0x10];
  96. #endif
  97. #ifndef __i386__
  98.     /*
  99.      *  Interrupt Acknowledge Register
  100.      */
  101.     OpenPIC_Reg _Interrupt_Acknowledge;        /* Read Only */
  102. #else
  103.     char Pad4[0x10];
  104. #endif
  105.     /*
  106.      *  End of Interrupt (EOI) Register
  107.      */
  108.     OpenPIC_Reg _EOI;                /* Read/Write */
  109.     char Pad5[0xf40];
  110. } OpenPIC_Processor;
  111.  
  112.  
  113.     /*
  114.      *  Timer Registers
  115.      */
  116.  
  117. typedef struct _OpenPIC_Timer {
  118.     OpenPIC_Reg _Current_Count;            /* Read Only */
  119.     OpenPIC_Reg _Base_Count;            /* Read/Write */
  120.     OpenPIC_Reg _Vector_Priority;        /* Read/Write */
  121.     OpenPIC_Reg _Destination;            /* Read/Write */
  122. } OpenPIC_Timer;
  123.  
  124.  
  125.     /*
  126.      *  Global Registers
  127.      */
  128.  
  129. typedef struct _OpenPIC_Global {
  130.     /*
  131.      *  Feature Reporting Registers
  132.      */
  133.     OpenPIC_Reg _Feature_Reporting0;        /* Read Only */
  134.     OpenPIC_Reg _Feature_Reporting1;        /* Future Expansion */
  135.     /*
  136.      *  Global Configuration Registers
  137.      */
  138.     OpenPIC_Reg _Global_Configuration0;        /* Read/Write */
  139.     OpenPIC_Reg _Global_Configuration1;        /* Future Expansion */
  140.     /*
  141.      *  Vendor Specific Registers
  142.      */
  143.     OpenPIC_Reg _Vendor_Specific[4];
  144.     /*
  145.      *  Vendor Identification Register
  146.      */
  147.     OpenPIC_Reg _Vendor_Identification;        /* Read Only */
  148.     /*
  149.      *  Processor Initialization Register
  150.      */
  151.     OpenPIC_Reg _Processor_Initialization;    /* Read/Write */
  152.     /*
  153.      *  IPI Vector/Priority Registers
  154.      */
  155.     OpenPIC_Reg _IPI_Vector_Priority[OPENPIC_NUM_IPI];    /* Read/Write */
  156.     /*
  157.      *  Spurious Vector Register
  158.      */
  159.     OpenPIC_Reg _Spurious_Vector;        /* Read/Write */
  160.     /*
  161.      *  Global Timer Registers
  162.      */
  163.     OpenPIC_Reg _Timer_Frequency;        /* Read/Write */
  164.     OpenPIC_Timer Timer[OPENPIC_NUM_TIMERS];
  165.     char Pad1[0xee00];
  166. } OpenPIC_Global;
  167.  
  168.  
  169.     /*
  170.      *  Interrupt Source Registers
  171.      */
  172.  
  173. typedef struct _OpenPIC_Source {
  174.     OpenPIC_Reg _Vector_Priority;        /* Read/Write */
  175.     OpenPIC_Reg _Destination;            /* Read/Write */
  176. } OpenPIC_Source;
  177.  
  178.  
  179.     /*
  180.      *  OpenPIC Register Map
  181.      */
  182.  
  183. struct OpenPIC {
  184. #ifndef __powerpc__
  185.     /*
  186.      *  Per Processor Registers --- Private Access
  187.      */
  188.     OpenPIC_Processor Private;
  189. #else
  190.     char Pad1[0x1000];
  191. #endif
  192.     /*
  193.      *  Global Registers
  194.      */
  195.     OpenPIC_Global Global;
  196.     /*
  197.      *  Interrupt Source Configuration Registers
  198.      */
  199.     OpenPIC_Source Source[OPENPIC_MAX_SOURCES];
  200.     /*
  201.      *  Per Processor Registers
  202.      */
  203.     OpenPIC_Processor Processor[OPENPIC_MAX_PROCESSORS];
  204. };
  205.  
  206. extern volatile struct OpenPIC *OpenPIC;
  207. extern u_int OpenPIC_NumInitSenses;
  208. extern u_char *OpenPIC_InitSenses;
  209.  
  210.  
  211.     /*
  212.      *  Current Task Priority Register
  213.      */
  214.  
  215. #define OPENPIC_CURRENT_TASK_PRIORITY_MASK    0x0000000f
  216.  
  217.     /*
  218.      *  Who Am I Register
  219.      */
  220.  
  221. #define OPENPIC_WHO_AM_I_ID_MASK        0x0000001f
  222.  
  223.     /*
  224.      *  Feature Reporting Register 0
  225.      */
  226.  
  227. #define OPENPIC_FEATURE_LAST_SOURCE_MASK    0x07ff0000
  228. #define OPENPIC_FEATURE_LAST_SOURCE_SHIFT    16
  229. #define OPENPIC_FEATURE_LAST_PROCESSOR_MASK    0x00001f00
  230. #define OPENPIC_FEATURE_LAST_PROCESSOR_SHIFT    8
  231. #define OPENPIC_FEATURE_VERSION_MASK        0x000000ff
  232.  
  233.     /*
  234.      *  Global Configuration Register 0
  235.      */
  236.  
  237. #define OPENPIC_CONFIG_RESET            0x80000000
  238. #define OPENPIC_CONFIG_8259_PASSTHROUGH_DISABLE    0x20000000
  239. #define OPENPIC_CONFIG_BASE_MASK        0x000fffff
  240.  
  241.     /*
  242.      *  Vendor Identification Register
  243.      */
  244.  
  245. #define OPENPIC_VENDOR_ID_STEPPING_MASK        0x00ff0000
  246. #define OPENPIC_VENDOR_ID_STEPPING_SHIFT    16
  247. #define OPENPIC_VENDOR_ID_DEVICE_ID_MASK    0x0000ff00
  248. #define OPENPIC_VENDOR_ID_DEVICE_ID_SHIFT    8
  249. #define OPENPIC_VENDOR_ID_VENDOR_ID_MASK    0x000000ff
  250.  
  251.     /*
  252.      *  Vector/Priority Registers
  253.      */
  254.  
  255. #define OPENPIC_MASK                0x80000000
  256. #define OPENPIC_ACTIVITY            0x40000000    /* Read Only */
  257. #define OPENPIC_PRIORITY_MASK            0x000f0000
  258. #define OPENPIC_PRIORITY_SHIFT            16
  259. #define OPENPIC_VECTOR_MASK            0x000000ff
  260.  
  261.  
  262.     /*
  263.      *  Interrupt Source Registers
  264.      */
  265.  
  266. #define OPENPIC_SENSE_POLARITY            0x00800000    /* Undoc'd */
  267. #define OPENPIC_SENSE_LEVEL            0x00400000
  268.  
  269.  
  270.     /*
  271.      *  Timer Registers
  272.      */
  273.  
  274. #define OPENPIC_COUNT_MASK            0x7fffffff
  275. #define OPENPIC_TIMER_TOGGLE            0x80000000
  276. #define OPENPIC_TIMER_COUNT_INHIBIT        0x80000000
  277.  
  278.  
  279.     /*
  280.      *  Aliases to make life simpler
  281.      */
  282.  
  283. /* Per Processor Registers */
  284. #define IPI_Dispatch(i)            _IPI_Dispatch[i].Reg
  285. #define Current_Task_Priority        _Current_Task_Priority.Reg
  286. #ifndef __powerpc__
  287. #define Who_Am_I            _Who_Am_I.Reg
  288. #endif
  289. #ifndef __i386__
  290. #define Interrupt_Acknowledge        _Interrupt_Acknowledge.Reg
  291. #endif
  292. #define EOI                _EOI.Reg
  293.  
  294. /* Global Registers */
  295. #define Feature_Reporting0        _Feature_Reporting0.Reg
  296. #define Feature_Reporting1        _Feature_Reporting1.Reg
  297. #define Global_Configuration0        _Global_Configuration0.Reg
  298. #define Global_Configuration1        _Global_Configuration1.Reg
  299. #define Vendor_Specific(i)        _Vendor_Specific[i].Reg
  300. #define Vendor_Identification        _Vendor_Identification.Reg
  301. #define Processor_Initialization    _Processor_Initialization.Reg
  302. #define IPI_Vector_Priority(i)        _IPI_Vector_Priority[i].Reg
  303. #define Spurious_Vector            _Spurious_Vector.Reg
  304. #define Timer_Frequency            _Timer_Frequency.Reg
  305.  
  306. /* Timer Registers */
  307. #define Current_Count            _Current_Count.Reg
  308. #define Base_Count            _Base_Count.Reg
  309. #define Vector_Priority            _Vector_Priority.Reg
  310. #define Destination            _Destination.Reg
  311.  
  312. /* Interrupt Source Registers */
  313. #define Vector_Priority            _Vector_Priority.Reg
  314. #define Destination            _Destination.Reg
  315.  
  316.     /*
  317.      *  OpenPIC Operations
  318.      */
  319.  
  320. /* Global Operations */
  321. extern void openpic_init(int);
  322. extern void openpic_reset(void);
  323. extern void openpic_enable_8259_pass_through(void);
  324. extern void openpic_disable_8259_pass_through(void);
  325. #ifndef __i386__
  326. extern u_int openpic_irq(u_int cpu);
  327. #endif
  328. #ifndef __powerpc__
  329. extern void openpic_eoi(void);
  330. extern u_int openpic_get_priority(void);
  331. extern void openpic_set_priority(u_int pri);
  332. #else
  333. extern void openpic_eoi(u_int cpu);
  334. extern u_int openpic_get_priority(u_int cpu);
  335. extern void openpic_set_priority(u_int cpu, u_int pri);
  336. #endif
  337. extern u_int openpic_get_spurious(void);
  338. extern void openpic_set_spurious(u_int vector);
  339. extern void openpic_init_processor(u_int cpumask);
  340.  
  341. /* Interprocessor Interrupts */
  342. extern void openpic_initipi(u_int ipi, u_int pri, u_int vector);
  343. #ifndef __powerpc__
  344. extern void openpic_cause_IPI(u_int ipi, u_int cpumask);
  345. #else
  346. extern void openpic_cause_IPI(u_int cpu, u_int ipi, u_int cpumask);
  347. #endif
  348.  
  349. /* Timer Interrupts */
  350. extern void openpic_inittimer(u_int timer, u_int pri, u_int vector);
  351. extern void openpic_maptimer(u_int timer, u_int cpumask);
  352.  
  353. /* Interrupt Sources */
  354. extern void openpic_enable_irq(u_int irq);
  355. extern void openpic_disable_irq(u_int irq);
  356. extern void openpic_initirq(u_int irq, u_int pri, u_int vector, int polarity,
  357.                 int is_level);
  358. extern void openpic_mapirq(u_int irq, u_int cpumask);
  359. extern void openpic_set_sense(u_int irq, int sense);
  360.  
  361. #endif /* __KERNEL__ */
  362.  
  363. #endif /* _LINUX_OPENPIC_H */
  364.